Staple-fastener.



No. 844,398. v PATBNTED FEB. 19, 1907. L. A. PLATE 6; W. T. ABEL,

STAPLE FASTENER.

APPLICATION FILED JAH.30.1906.

WITNESSES: INVENTOHJ/ MU my 'f w ATTORNEY.

UNITED STATES PA TFJN T OFFICE.

LEWIS A. PLATT AND WALTER T. ABEL, OF

ASSIGNORS TO THE PLATT BROTHERS & COMPANY, CONNECTICUT, A CORPORATION OF CONNECTICUT.

WATERBURY, CONNECTICUT, or WATERBURY,

STAPLE-FASTENER.

Specification of Letters Patent. Patented Feb. 19, 1907.

Application filed January 30,1906. Serial No, 29 8,632.

circular plate 6, having its edge bent around and under the same, forming a continuous To all whom it may concern:

Be it known that we, Lnwrs A. PLATT and WALTER T. ABEL, citizens of the United ring of metal f, somewhat wider at those por- States, and residents of Waterbury, in the tions from which the prongs extend or procounty of New Haven and State of Connectljeet.

out, have made and invented certain new and useful Im rovements in Staple-Fasteners, of which t 1e following is a specification.

Our invention relates to an improvement I in 'metal staple-fasteners-such, for instance, as may be employed for fastening or securing together leather or fabrics or to attach but tons or other articles to the latterthe ob ject of the same this kind or character which shall be made of l a single piece of sheet metal as strong or stronger than those produced from wire and at a much less cost.

With these and other ends in view the invention consists in certain novel features of construction, as will be hereinafter described, and specifically pointed out in the claims.

In the accompanying drawings, Figure 1 is a plan view of the blank from which the staple-fastener is formed. Figs. 2, 3, 4, 5, and 6 are views showing the fastener in its several sta es of formation. Fi si7 and 8 are views in e evation of the finis red fastener. l Fig. 9 is a top plan viev of the fastener illustrated in Fig. 6. Fig. 10 is a sectional view taken on the line 10 10 of Fig. 7.

The fastener is preferably formed of a sin- \Ve have found by experiment that in order to form a circular and neat-appearing head for the fastener it is preferable to stamp out the blank with the elliptical central por tion A, as illustrated in Fig. 1, as by forming the same of a round or circular shape the finished head will be elliptical in form or the metal comprising the ringf will be caused being to provide an article of to overlap, the result being that the head will be thick or bulky and unfinished in appearance.

As illustrated in Fig. 1, the prongs B of the blank are comparatively wide at the base in order to contain an amount of metal to lend sufficient strength thereto even though stamped out of comparatively light stock. These prongs in the final operation are bent or curved in their length, as illus trated in Fig. 10, thereby materially increas ing the strength of the same, the stiffness of the metal graduating from the point to the base. By thus shaping the prongs all danger of their cutting or forming large openings in the cloth or material through which they are passed is avoided.

By reference to Fig. 8 it will be seen that in the formation of the fastener the prongs gle piece of sheet metal, the shape or outline i h of the finished fastener are staggered, so of the blank being illustrated in Fig. 1 and that in the subsequent bending thereof the consisting of the central portion A, elliptical pointed ends will'be allowed to ass each in form and having extendin therefrom the other, and thereby avoid any anger of V-shape projections B, the e liptical central ortion A forming the circular head of the nished fastener, as hereinafter described.

By a second operation this blank is drawn into the shape as illustrated in Figs. 2 and 3,

the elliptical central portion being cupped, as

illustrated at C. This partly-formed fastener is then subjected to a further operation which partially forms the head D, as illustrated in Figs. 4 and 5, and to still another and prongs extending from the wider poroperation which completes the head, as illustions of said turned-under edge,substantially trated at E, Fig. 6, this head consisting of the as described.

striking and causing an imperfect fastening of the materials together or of the button or other article to the material.

Having fully described our invention, what we claim as new, and desire to secure by Letters Patent, is-

1. A staple, comprising a circular head having its edge turned or bent under the same, said turned-over edge varying in width,

2. Astaple comprisingaoireular head hav- New Haven and State of Connecticut, this ing its entire edge turned or bent under the 27th day of January, A. D. 1906 same, said turned-under edge varying in LEWIS A. PLATT. width, and prongs extending from the Wider WALTER T. ABEL. portions of said edge and curved eoeentrio- Witnesses:

all to the head, substantially as described. K. A. RUBEY,

lgned at \Vaterbury, in the county of; E. V. BRONSON 

